Validate behavior of mixing dynamic and static suggestions

Created by: fkling

We currently implement four suggestion source: "default" static suggestions, symbol suggestions (dynamic), static filter value suggestions and dynamic filter value suggestions. This allows us to show static suggestions immediately, but at the same time it can be confusing that some suggestions appear immediately and then the dynamic suggestions are added to the list. This is especially bad if a user has a static suggestion selected, the dynamic suggestions are loaded and changes that selection.

So it looks like we have to revert to the same (or at least similar) behavior as we have for Monaco.